local x = new Listing {
  "one"
  "two"
}

res1 = x != x
res2 = x != new Listing {
  "one"
  "two"
}
res3 = x != new Listing {
  "two"
}
res4 = x != new Listing {
  "two"
  "one"
}
res5 = x != (x) {}
res6 = x != (x) { "one" }
res8 = x != (x) { default = 9 }
res9 = (x) { default = 9 } != (x) { default = 10 }
res10 = new Listing { "one" } != new Listing { "one"; default = 9 }
